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THz time-domain spectroscopy of mixed CO2–CH3OH interstellar ice analogs

McGuire, Brett A.; Ioppolo, Sergio; Allodi, Marco A. and Blake, Geoffrey A. (2016). THz time-domain spectroscopy of mixed CO2–CH3OH interstellar ice analogs. Physical Chemistry Chemical Physics, 18(30) pp. 20199–20207.

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The icy mantles of interstellar dust grains are the birthplaces of the primordial prebiotic molecular inventory that may eventually seed nascent solar systems and the planets and planetesimals that form therein. Here, we present a study of two of the most abundant species in these ices after water: carbon dioxide (CO2) and methanol (CH3OH), using TeraHertz (THz) time-domain spectroscopy and mid-infrared spectroscopy. We study pure and mixed-ices of these species, and demonstrate the power of the THz region of the spectrum to elucidate the long-range structure (i.e. crystalline versus amorphous) of the ice, the degree of segregation of these species within the ice, and the thermal history of the species within the ice. Finally, we comment on the utility of the THz transitions arising from these ices for use in astronomical observations of interstellar ices.

Item Type: Journal Item
Copyright Holders: 2016 the Owner Societies
ISSN: 1463-9084
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetFP1-PEOPLE-2011- IOF-300957Marie Curie Fellowship
Keywords: Physical and Theoretical Chemistry, General Physics and Astronomy
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 53231
SWORD Depositor: Jisc Publications-Router
Depositing User: Jisc Publications-Router
Date Deposited: 08 Mar 2018 14:42
Last Modified: 01 May 2019 19:49
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